Patents by Inventor Larry Coldren
Larry Coldren has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240089001Abstract: Systems and methods for fabricating an optoelectronic transceiver with a tunable traveling wave modulator and an analog coherent receiver to transmit and receive wavelength-multiplexed optical signals in accordance with embodiments of the invention are disclosed. In one embodiment, a network switch includes a plurality of ports configured to transmit and receive optical signals and electrical current signals, a plurality of optoelectronic transmitters using a traveling wave modulator and driver biasing, and a plurality of analog coherent receivers.Type: ApplicationFiled: September 13, 2023Publication date: March 14, 2024Applicant: The Regents of the University of CaliforniaInventors: Clint Schow, James Buckwalter, Aaron Maharry, Hector Andrade, Larry Coldren
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Publication number: 20060257065Abstract: Traveling-wave optoelectronic wavelength conversion is provided by a monolithic optoelectronic integrated circuit that includes an interconnected traveling-wave photodetector and traveling-wave optical modulator with a widely tunable laser source. Either parallel and series connections between the photodetector and modulator may be used. An input signal modulated onto a first optical wavelength develops a traveling wave voltage on transmission line electrodes of the traveling-wave photodetector, and this voltage is coupled via an interconnecting transmission line of the same characteristic impedance to transmission line electrodes of the traveling-wave optical modulator to modulate the signal onto a second optical wavelength derived from the tunable laser. The traveling wave voltage is terminated in a load resistor having the same characteristic impedance as the photodetector and modulator transmission lines.Type: ApplicationFiled: July 19, 2006Publication date: November 16, 2006Inventors: Christopher Coldren, Larry Coldren
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Publication number: 20060140528Abstract: Traveling-wave optoelectronic wavelength conversion is provided by a monolithic optoelectronic integrated circuit that includes an interconnected traveling-wave photodetector and traveling-wave optical modulator with a widely tunable laser source. Either parallel and series connections between the photodetector and modulator may be used. An input signal modulated onto a first optical wavelength develops a traveling wave voltage on transmission line electrodes of the traveling-wave photodetector, and this voltage is coupled via an interconnecting transmission line of the same characteristic impedance to transmission line electrodes of the traveling-wave optical modulator to modulate the signal onto a second optical wavelength derived from the tunable laser. The traveling wave voltage is terminated in a load resistor having the same characteristic impedance as the photodetector and modulator transmission lines.Type: ApplicationFiled: February 22, 2006Publication date: June 29, 2006Inventors: Christopher Coldren, Larry Coldren
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Publication number: 20050265420Abstract: The present invention relates to the tailoring the reflectivity spectrum of a sampled-grating distributed Bragg reflector (SGDBR) by applying digital sampling theory to choose the way each reflector is sampled. The resulting mirror covers a larger wavelength span and has peaks with a larger, more uniform, coupling constant (?) than the mirrors produced using conventional approaches. The improved mirror also retains the benefits of the sample grating approach. Additionally, most of the embodiments are relatively simple to manufacture.Type: ApplicationFiled: July 13, 2005Publication date: December 1, 2005Inventors: Gregory Fish, Larry Coldren
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Publication number: 20050100065Abstract: Controller calibration methods for use with sampled getting distributed Bragg reflector SGDBR laser (102) is presented. An exemplary method includes conducting a two-dimensional mirror current scam of each front mirror current setting and back mirror current setting for a sampled grating distributed Bragg reflector SGBDR laser(102) to produce laser setting data corresponding to each front mirror current setting and back mirror current setting to generate a reference optical signal (114) of the SGDBR laser (102). A channel operating point is determined for each channel within the two-dimensional scan data A fix up of the operating point to substantially minimize wavelength and power error can also be performed A two-dimensional control surface is characterized at the channel operating point for each channel. A lookup table for controlling the SGDBR (102) laser is generated from the operating point currents, locker values and two-dimensional control surface data from each channel.Type: ApplicationFiled: May 15, 2002Publication date: May 12, 2005Inventors: Larry Coldren, Michael Larson
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Publication number: 20050018941Abstract: Traveling-wave optoelectronic wavelength conversion is provided by a monolithic optoelectronic integrated circuit that includes an interconnected traveling-wave photodetector and traveling-wave optical modulator with a widely tunable laser source. Either parallel and series connections between the photodetector and modulator may be used. An input signal modulated onto a first optical wavelength develops a traveling wave voltage on transmission line electrodes of the traveling-wave photodetector, and this voltage is coupled via an interconnecting transmission line of the same characteristic impedance to transmission line electrodes of the traveling-wave optical modulator to modulate the signal onto a second optical wavelength derived from the tunable laser. The traveling wave voltage is terminated in a load resistor having the same characteristic impedance as the photodetector and modulator transmission lines.Type: ApplicationFiled: December 1, 2003Publication date: January 27, 2005Inventors: Christopher Coldren, Larry Coldren
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Method of generating an optical signal with a tunable laser source with integrated optical amplifier
Patent number: 6687278Abstract: A method of generating an optical signal provides a diode laser assembly including an epitaxial structure formed on a substrate. A laser and an amplifier are formed in the epitaxial structure. At least a portion of the laser and amplifier share a common waveguide. A tunable laser output is produced from the laser. The laser output is coupled into the amplifier along the common waveguide. An optical signal is generated from the amplifier.Type: GrantFiled: July 12, 2000Date of Patent: February 3, 2004Assignee: Agility Communications, Inc.Inventors: Thomas Beck Mason, Gregory Fish, Larry Coldren -
Patent number: 6658035Abstract: A laser assembly includes an epitaxial structure formed on a substrate. A separately controllable tunable laser resonator and external optical amplifier are formed in the epitaxial structure. At least a portion of the laser and amplifier share a common waveguide, which may have non-uniform optical or geometrical properties along the waveguide centerline or across a normal to the centerline.Type: GrantFiled: July 12, 2000Date of Patent: December 2, 2003Assignee: Agility Communications, Inc.Inventors: Thomas Beck Mason, Gregory Fish, Larry Coldren
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Patent number: 6654400Abstract: A method of making a diode laser assembly provides a substrate. An epitaxial structure is formed on the substrate. Different areas of the epitaxial structure have different optical properties. A laser, a modulator and a coupler are formed in the epitaxial structure.Type: GrantFiled: July 12, 2000Date of Patent: November 25, 2003Assignee: Agility Communications, Inc.Inventors: Thomas Beck Mason, Gregory Fish, Larry Coldren
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Patent number: 6628690Abstract: A laser assembly includes an epitaxial structure formed on a substrate. A laser resonator, a modulator and a coupler are formed in the epitaxial structure. The coupler is positioned to receive and adjust an output received from the modulator.Type: GrantFiled: July 12, 2000Date of Patent: September 30, 2003Assignee: Agility Communications, Inc.Inventors: Gregory Fish, Larry Coldren
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Patent number: 6624000Abstract: A method of making a wavelength converter assembly forms an epitaxial structure on a substrate. Different areas of the epitaxial structure have different optical properties. A laser is formed in the epitaxial structure. A photodetector is formed in the epitaxial structure.Type: GrantFiled: July 12, 2000Date of Patent: September 23, 2003Assignee: Agility Communications, Inc.Inventor: Larry Coldren
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Patent number: 6614819Abstract: A method of converting an optical wavelength includes providing a wavelength converter assembly with a photodetector and a laser with a common epitaxial structure. The expitaxial structure has areas of differing bandgap. An optical input having a first wavelength at the wavelength converter assembly is absorbed. A first electrical signal is generated from the photodetector in response to the optical input. The first electrical signal is conditioned to produce a conditioned first electrical signal. A second electrical signal is generated from the conditioned first electrical signal. A laser output is generated from a gain medium of the laser at a second wavelength in response to the second electrical signal.Type: GrantFiled: July 12, 2000Date of Patent: September 2, 2003Assignee: Agility Communications, Inc.Inventors: Gregory Fish, Larry Coldren
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Patent number: 6580739Abstract: A wavelength converter assembly includes a substrate. An epitaxial structure is formed on the substrate with areas of different optical properties. A laser and a photodetector are formed in the epitaxial structure. The photodetector generates a first electrical signal in response to an optical signal. A conditioning circuit is coupled to the laser and the photodetector. The conditioning circuit receives the first electrical signal and provides a second electrical signal to the laser to modulate its optical output.Type: GrantFiled: July 12, 2000Date of Patent: June 17, 2003Assignee: Agility Communications, Inc.Inventor: Larry Coldren
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Patent number: 6574259Abstract: A method of making a diode laser assembly includes providing a substrate. An epitaxial structure is formed on the substrate. Different areas of the epitaxial structure have different optical properties. A laser, a modulator and a coupler are formed in the epitaxial structure.Type: GrantFiled: July 12, 2000Date of Patent: June 3, 2003Assignee: Agility Communications, Inc.Inventors: Gregory Fish, Larry Coldren
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Patent number: 6349106Abstract: A method of converting an optical wavelength includes providing a wavelength converter assembly with a photodetector and a laser that have a common epitaxial structure with areas of differing bandgap. The laser including a laser resonator. An optical input with a first wavelength is absorbed at the wavelength converter assembly. A first electrical signal is generated from the photodetector in response to the optical input. The first electrical signal is conditioned and produces a conditioned first electrical signal. A second electrical signal is generated from the conditioned first electrical signal. A laser output is generated from a gain medium of the laser at a second wavelength in response to the second electrical signal.Type: GrantFiled: July 12, 2000Date of Patent: February 19, 2002Assignee: Agility Communications, Inc.Inventor: Larry Coldren